Tektronix 494, 494p schematic

I
OPERATORS MANUAL
494/494P
SPECTRUM
PartNo. Product
070-4418-00
Group
26
ANALYZER
i
First Revised
Printing
NOV
OCT
1986
1983
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494/494P
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PREFACE
LIST LIST
OPERATORS
SERVICE
Section
Section
Section
Section
. .
OF
ILLUSTRATIONS
OF
TABLES
SAFETY
1
GENERAL
2
SPECIFICATION
Electrical
3
INSTALLATION FOR
4
CONTROLS, INDICATORS
Un-Nomenclated Pushbutton
TABLE
. ... . . . . . .
. . . . . ... . . ... ... . . . . . .
SAFETY
SUMMARY
Product Options
Configuration
Options Accessories
Firmware Readout
Introduction
USE
Introduction Unpacking
Power Requirements
Repackaging Storage..
Introduction
Shift
Functions
Instrument
Crt
Controls.. Sweep Display
General
494P
(GPIB) Front-Panel Rear-Panel
Operational Service
. . ... . ... . ... . . .
. ... . ... . . ... . _ .
SUMMARY
. ... . ... . . . . . ... .
INFORMATION Overview
for
Power
. ...
. . . . ... . ... . ... . ... . ...
. . . . . ... . . . . ... . .
Version
. . ...
... . . . . . ... . ...
. . .
. . ...
Characteristics.. .
AND
. . . .
and
Initial
Source
or
Parameters
Purpose
Related
and
. . . ... . ... . . . . . .
for
Shipment
. ... . . . ...
CONNECTORS,
. . . . ... .
of
Power
.
. ... .
Scan
. . ... ... . ... . ...
Pushbuttons
Controls
Input/Output
Input/Output
Front
Functions
Functions..
Functions
OF
Page
. . ...
. .
.
.
.
. . .
.
... . .
.
. ... . ... . ... . .
Cord
. . . . . . ... . ... .
and
Error
. ...
.
PREPARATION
. . ... . . ... . . . . ..3-1
Inspection
Power
. .
. . . . . .
AND
... . . . . . .
the
Pushbuttons
Control
.
... . ... .
. . . . . . . ... .
... . ... . . . . ..4-3
. . . ... . . . . .
Connectors
Connectors
Panel
. . . . . . . . ... . .
. . . .
.
. . . . ...
,
. . .
.
.
Message
.
. . . . . ...
. . . ... .
. .
.
.
. . ...
.
. . . .
,
.
. . . .
. ....4-12
. .
.
.
.
.
.
4-12
4-12
1-1
1-1 1-1
1-1
1-3
2-1
2-1
3-1
3-1
3-2 3-3
4-1
4-1 4-1 4-2
4-2
4-9 4-9
4-10 4-10
CONTENTS
i
Section
iv iv
v
vii
Section
6
5
TURN-ON OPERATIONAL
Firmware
Readout.. . ... . ... . .
Firmware Error
Turn Use
FunctionalorOperational
Equipment Preliminary
2.Check
3.Check
4.Check
5.Check
6.Check
7
8.Check 9
10.GPIB
GENERAL
Firmware Readout Using Crt
Intensity Signal
Resolution Span, Using
AUTO
Using
Using Time
PROCEDURE
Version
Version
Message
On
Procedure
. . .
.
. . . . . . . . . . . . . . . ... . . .
1.Initial 2
.
1.Check
.
.
Light
Turn
Calibrate Reference
Range
Pushbuttons
Resolution
Linearity.. . . ... .
and
RF Check
Check Stability
the
Domain
.
Required.. . . ... .
Preparation
OperationofFront Panel
Gain
Counter Span
Resolution
Shape
Reference
Attenuator
Sensitivity..
Residual Frequency
Verification
OPERATING
Version
. . . .
the
Help
Filters
Level
Application
Bandwidth,
and
Sweep
the
MANUAL
PEAK
the Signal
Video
AND
CHECK
and
Error
Message
.
. . ...
. . . . ...
. . . . . . . ... . . . .
Readout
and
On
Center
Level,
.
. . . . . . . ... . . . . ... .
and
Variation
Bandwidths
Accuracy
Factor
. ... . .
and
. . . . . . . . . . ... . .
Feature
... . . . . . . . . . . . ..6-1
and
Time
Mode
Identifier
Filters
Operation
. . . . . .
Preparation
. . . . . ... ... . .
Frequency,
and
Dynamic
Check..
.
. . . .
. ... . .
Controls
Between
. . ... . .
Accuracy..
and
. . . . . . . . . . .
Bandwidth
. ... . . . . . . .
Level
Gain
Steps
. ...
. . . . .
. . . ... . . . .
FM
. . . . ... . . .
Drift
or
.
. . ..... . . ...
Program
PROCEDURE
Error
. . . . . . . . ..6-1
Beam .
. . ... . . . . . . . .
Frequency
. . ... . . ...
PEAK
. .
.
. . . ... ... .
...
.
Message
Alignment
Control
. . . . . . . .
. . . . ...
. . . . ... ..6-5
Page
5-1
.
5-1
. , .
.
5-1
for
. . .
5-1
.
5-1
5-2
. ...
5-3
. . ..5-3
5-3
... .
5-3
5-9
. ..5-10
5-10
5-10
and
5-10 5-11
5-13
5-14 5-14
. .
.
. ..6-1
6-1 6-1
6-2
or
6-3 6-3 6-4
REV
MAY
1984
4941494P
Operators
Section
6
TABLE
GENERAL (cant)
Triggering Sweeping Manual Scan
Reference Vertical JA
Using
Mode.. . . . . . . ... . . ... ... . . . . .
Digital Store/Recall
Using Using Feature.. Un-Nomenclated
Pushbutton External Reference
Conversion
Handling.. . . . ... .
Installation..
Operation
494P Connectors
GPIB RESET
ADDRESSED PLOT.. Setting Switches
Talk/Listen-Only TALK
Switches
Data Restoring Display
OPERATING
the
Display
the
Display
the
of
Level,RFAttenuation,
Display
Mode
Min
Storage
the
Counter
the
Automatic
Mixers
GPIB
Controls,
.
Function
TO
. ... ..... . . . . . . . . ... .
the
ONLY,
Logging
Control
. . ... ... . . . . . . . . . . ... ..6-15
.
. .....
. ... ... ..... ... ... . . .
Noise or
. ... . . . . . ... . . . . .
Feature
. ...
. . . ... ... ... . . . .
Front
Functions
and
Level
Readout
Loss
for
. . . . . . . ... . . . . ... .
. ... . ..... .
.
. ... ..... . . . ... . . ...
Readout
LOCAL
...
GPIB
ADDRESS
. . . . ... . . ... ... . . . . . .
Operation
LISTEN
. . . . . . . ... . . . . . ..... .
. . ..... . . . . . .
Settings
OF
PROCEDURE
. . . . . . . . . ..6-5
. . . . . . . . . ..6-5 Operational
Spectrum
. . . ... . . .
Min
Distortion
. ... ... . . . . .
. ... ... ... . ...
Calibration
Panel
. ... . . ... . .
Diplexer
and
External
. ... ... . . . . ..6-10
...
Indicators,
.
. . . . .
(REMOTE)
. ... ...
. .
. . . . . ..6-13
ONLY
and
. . ..6-5
. . . .
Mixers
.
. . . . . .
and
, ...
... . .
. . .,.
the
CONTENTS
Page
Section
and
6-6 6-6
...
6-6 6-7
6-8 6-8
6-8
6-8
.
6-9
6-9
6-10 6-11
6-11 6-11
6-11 6-12
.
6-12
6-13
6-13 6-14
Section
Appendix
(cont)
6
GENERAL, {cont)
Connectingtoa
494/494P
Service Product
7
OPTIONS
Option08. . . . . . . . . . . . ... . . ... . . . .
Option
Option13. ... . . . . . . . . ... . . . . . . . . .
Option14. ... . . ... ... . ..... . . . . . .
Option20. ... . . ... ... . ..... . . . . . .
Option
Option22. . . . . . ... ...
Options (Rackmount/Benchtop
Option30. . ..... ... ... ... . . . . . . . .
Option31. . ..... . . ... . ... . . . . . . . .
Option32. Options
Characteristics
Safety Accessories
Option41... ..... ... . . ...
Option52. . . ..... ... . ... . . . . . ... .
A
GLOSSARY General Terms
Terms Terms Spectrum
OPERATING
Precautions
. ... . . . . . ... ... . . . . . . . . .
Manual
Service
12
. ... . . . . . . . . ... . . . . . . . . .
21
. ... . . ... ... . ..... . . . . . .
30,
31,
and
. ... . . . . . . . . ... . . . . . . . .
31,
30,
and
. . . . . . . ..... .
Requirements
. . . . . . . . . ... . . . ... .
Terms
RelatedtoFrequency.... . .
RelatedtoAmplitude.... . .
Related
Analyzers.. ... ..... . .
PROCEDURE
System
. . . . . ...
. ... . ..... . . . . . .
32
32
. . . . . . ... ... .
to
Digital
. . ... ... .
for
the
. . . . . . . . .
. ..... . . . . . .
Versions)
Environmental
. . ...
Storage
. . . ...
. . . . . .
.
. . . . . .
. . . . ... .
. . . . .
for
Page
6-16
6-16 6-17
6-17
7-2 7-2 7-2 7-2
7-2 7-3 7-3
7-4 7-4
7-4 7-4
7-4 7-6 7-6
7-6 7-6
A-1 A-1
A-2
A-3
494/494P
Fig
.
No
.
2-1 2-2
3-1
4-1
4-2 5-1 5-2
5-3 5-4
5-5
5-6
6-1
6-2
Operators
494/494P
Probe
Dimensions International
(Option
Front
connectors Rear
Crt Typical
SPAN Integrating
Using response.. .
Displays shape Typical
residual
Volts/dBm-Watts impedance Circuit
coupled)
Spectrum
power
power
A1-A5)
panel
selectors,
. . . . ... .
panel
connectors
display
and
display
position
a
display
IDENT
feature
that
factor
are
display
FM.. .
. . ... . .
ofa75to50S2matching
. . ... . . . .
LIST
Analyzer.. . . . . ... . .
connector
.
. . ... .
for
readout
of
calibration
. . . . . . ...
... ... . . . . ... ...
illustrate
determined..
showing
. . . ._. . ... ... . .
conversion
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. .
... . . . . ...
. .
. . . . . .
cord
configuration
4941494P
controls,
.
. ... . . ... . . . . .
on the
for
power-up
markers
. . . . . . . . . ... . .
with
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to
identifyareal
how
bandwidth
howtodetermine
chart
. . ... . . . ...
... . . . . . . . . . . . ... .
OF
.,... . . ...
.
. . . . ... . . .
and
494/494P..
Filter.5-5
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... ..... ..5-11
.
for50SZ
. . . . . .
pad
(ac
.
state
in
MAX
or
true
and
. . ... .
..6-2
ILLUSTRATIONS
Page
..2-12
. .
.
6-3
No
viii
2-14
3-2
4-2 6-6 4-11
5-1
5-2
5-6
5-14
6-3
6-4
6-5
6-7
6-8
6-9 6-10
6-11 6-12
6-13
6-14
7-1
Fig
.
.
Graph d6m,
included Typical waveguide
Identifier Integrating
UsingB-SAVE between
Diagram
installation.. . . . . ... . ... ... . . ... . .
Typical GPIB
494P.. StatusofGPIB
GPIB
TEKTRONIX
Drive Controls on to
International configuration
to
d6mV
display
display
selectors
ADDRESS
in
a
the
Talk/Listen
illustrate
where
mixer
mode
the
SAVEAandBdisplays showing
. . . ... ... . ... . . . . .
Talk/Listen
the
the
and
c1BjuV
necessary)
generatedbya
. ... . ... ... . ...
displays
display
from
as
4924
4924
power
for
A
to
external
and
shown
switch
Digital
Only
cord
the
with
observe
an
indicators
Only
and
transfers
494/494P
relationship (matching
. . . . ... .
waveguide
external
on
on
the
Cartridge
system
494P
and
attenuator
. . ... . .
signal
. ... ... .
the
Video
the
differential
.
mixer
unique
.
. . . . . . . . .
the
crt
readout6-12
rear
. . ... . .6-14
that
.
. . . . . . . .6-15
plug
. . . . ... . .
Page
between
... ...
into .
. .
Filter6-5
. . . . ...6-7
mixer
to
panel
Tape
are
6-3
the
6-4 6-4
. . .
6-9
. . . .6-11
the
6-12
.6-13
used
.7-1
Table No
1-1 1-2
2-1 2-2
2-3 2-4
2-5 2-6
2-7
2-8 2-9
2-10
iv
.
Standard
Tektronix
Mixers
Frequency IF
Number
Amplitude
Sensitivity.. Input
Output General Power
Environmental Physical
Accessories.. . . . . . . . . . . . ... .
High
. . .
.
Related
Frequency,
(N)..
Related
Signal
Characteristics
Signal
Characteristics
Requirements
Characteristics
Performance
. . . . . . . . . . .
Characteristics
LO
Range,
. . . . . ...
Characteristics
. ... . ...
Characteristics....
Characteristics
Waveguide
. .
.
.
and
. . . ... . . . .
. . . ... . . . . . . . .
.
. ....... . . . . .
. . . . ... ... .,.
. . . . . ... . . .
LIST
... ... . . . .
. ... . ..2-1
Harmonic
.
. . . .
. . . . . ... . ..2-9
. .
. ... ... . . ..2-12
OF
Page
... . .
..2-5
.
.
. .
...
.
. .
. ... .
. . ..2-14
1-2
1-2
2-5 7-2
2-8
2-10 2-11
2-12 7-6
TABLES
Table No
.
2-11
3-1 5-1
7-1
7-3 7-4
7-5
494/494P Requirement
Shipping 494/494P Power
Option Mixers)
Option21(WM Option22(WM
Options Characteristics
Options
Characteristics.. . ... . . . ... .
Safety
Carton
Sensitivity
Cord
20
(General
Characteristics
30, 31,
30, 31,
Standard
Conformance
Test
Options
Purpose
490-2) 490-3)
&32Environmental
. . ... ... _
&32Physical
and
Regulatory
. . . . . . . .
Strength
. . . . . . . . . . ... . ... .
. .
.
. . . . ... . ... . . . .
Waveguide
. .
... . . . . . ... . . .
Characteristics Characteristics
. . . . .
... . .
. . . . . ... ..3-3
.
. . .
. . ..7-3
. . . . ....7-5
... . ... .
. .
Page
2-15
5-13 7-1
7-2 7-3
7-5
494(494P
Operators
The
informationinthis operating cautions
apply,
willbefound
but
CONFORMANCE
494/494P
The
Standards
Safety
Safety
CSA--Electrical
FM-Electrical
ANSI and Instrumentation
IEC Electronic
Regulatory
VDE
0871
High
Frequency
and
servicing
may
not
and
Utilization
039
Electronic
348
(2nd
Requirements
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OPERATORS
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Requirements
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in
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494/494P
Operators
Do
Do
product and
resuscitation
Care
Dangerous
uct.To tions
avoid
Service
perform
unless
another
When
voltages
personal
components
FOR
Refer
Alone
internal
person
is
present
Servicing
existatseveral
injury,donot while
SERVICE
QUALIFIED
alsotothe
serviceoradjustment
capableofrendering
.
With
power
Power
touch
ison.
On
pointsinthis
exposed
Disconnect
SAFETY
SERVICE
preceding
of
this
first
prod-
connec-
power
SUMMARY
PERSONNEL
Operators
before
components
Power
This
that
will
conductorsorbetween A
protective
torinthe
Safety
removing
.
Source
product
apply
ground
power
protective
is
intendedtooperate
more
cord,isessential for
ONLY
Summary
panels,
than
either
supply
connection,
soldering,orreplacing
fromapower
V
conductor
safe
between
grounding
and ground
conduc-
operation
source supply
.
.
494/494P
Operators
Viii
4941494P
Spectrum
Analyzer
.
Section
1-4941494P
Operators
Product
high
Microcomputer
hances quency
ability, storage settings scribes
along
The
nal mixer, guide
withaminimum resolution racy
tions to
compare
addition to nine
be
storedinnon-volatile ditional panel
Center panel
keyboard.When alter lected.Other
ence previously
Counter
In
time
quency
After time.Display
ence
selectable
(amplitude)
the spondtothe
tion is-121
21
GHz
Overview
494 and
The
performance,
operation.Its
accuracy
precise
display,
and
function of
with
messages
frequency
and
mixers.A
thatiscommensurate
Digital
.
such as
separate
analysis
control
frequency
tuning
the
Span/Div
level,
may
accuracyto1
addition, for
stable
driftisless
one
hour,itis
level
steps
mode.When
Data
Entry
in
Section6).
dBm
.
control
amplitude
displays,
upto325
storage provides
SAVE
and
subtract
the
conventional
displays
setups
knob
parameters,
alsobekeyboard
available
the
operation
dynamic
readout
from1to15dB,
keyboard,
display
to7.1
GENERAL
the
494P
programmable
compact,
and
non-volatile
the
that
range
minimum
spanof50
A,B-SAVE
and
comparison.Uptoten
can
may
or
using the
setting
only
494/494P
than
less
range
from
mode
Sensitivityat30
portable
most
of
main
stability,
and
front
is
displays,
with
memory,
directly
Hz
500
the
GHz,
functions
features
measurement
memory
crt
message
panel
explain
10
kHz
GHz
when
resolution
Hzldlv,
flicker
digital
their
alsobestored
be
selectedbymeansofthe
selected
keyboard,itis regardlessofthe
suchasvertical
under
resolutionisavailable
requires
.In15
Hz
per minuteofsweep
than
50 Hz 80
is
-117
vertical
the
reference
(see
General
decreasing
instruments are
spectrum
simplifies
are;synthesizer
precision
controls
operating
to 21
provides
with
free MAX
A,
save
storage
parameter then
selected
GPIB
minutes
dB,
dBm
and0.25
displayisselected
Hz
signal
capability,
retain
to
readout
and
errors
GHz
with
using
external
bandwidth
measurement
the
frequency
displays
HOLD
maximum
feature,upto
readouts,
later
recalled
different
for
future
by the
not
necessary
frequency
display
with
program
onlyashort
or less
per
minute
with
calibrated
to
A-30
foradelta
dB
level
steps
Operating
resolution
to-96
analyzers
and
counting
front
that selectors .
the
of30Hz,
plus
with
values
for
recall
Data
and
the
flexibility
control
.
warm-up
the
sweep
of
dBm,
informa-
bandwidth
dBm
INFORMATION
The
494P
featuresofthe
those
intended
tobeused
operation
rackmount
Analyzeristhe inastandard
cabling
1st
provides
rear
benchtop
feetonthe
benchtop
cooling.This
applying
approved
are
listed
.
for
of
.
such
1-2
the
operated
LO,
panel
the
as
en-
fre-
digital
panel
de-
inter-
wave-
accu-
func-
which
.
In
can
ad-
front-
.
front-
Entry
to
se-
refer-
fre-
time
refer-
in A
with
corre-
at
instrument cept
.
be remotely the
494P
lers.This mers manual
The Spectrum to
mount
semi-rigid INPUT, This cabinet
The
rackmount
the
els
and
and
ditional
before
Options
Tektronix
tionally These
manual
Options
.
Options
section versions
.
Accessories
Standard
are
listedinTable
sories etc.Table
available.Standard listedinVolume2of
Replaceable suchascables
throughout
adds
remote
for
local
through
with
describedindetailin-
is
.
version
from
the
2nd
L0,
access
version cabinet
cabinets
Power
has
the
accessories
;
Mechanical
manual
to
.
version
bottom
includealarger
fan
powertothe
Cord
implemented
power
illustratedinthe
and
494/494P
manuals
1-1,Inaddition waveguide lists
Tektronix
accessories,
the
adapters
and
andinthe
control
494.The
a
instrument
19-inch
etc.)to
all
(Option
must
capabilitytothe
front-paned controls
use,
suchasINTENSITY)
the
GPIB
varietyofsystems
(Option 30)
inacabinet
rack.Option
panel
front
the
front-panel
32)isthe
with
the
the
cabinet.Both
of
be
installed
instrument
Configuration
options
cord
and
Options
describedinthe
are
including
that
come
with
there
mixer
sets,
Tracking Generators,
waveguide
with part
service
Parts
instructions,
list.Optional
are
listed,
Tektronix
standard
(ex-
can
which
port,
the
of
connectors(e.g.,RP
back
of
connectors
494or494P
addition
(external)
and
.
that
provide
plug
configurations
sectionofthis
mountlbenchtop
rack
each
are
optional
mixers
numbers,
where
catalog
allows
and
control-
the
Program-
494/494P
designed
31
includes
the
cabinet
via
of side
following
accessories
appropriate,
pan-
rackmount
fan
for
operating
interna-
Options
instrument
acces-
that
.
are are the
.
the
in
ad-
.
REV
MAR
1984
General
50
ohm
50
ohm
Adapter, Fuses,
Power Cord Crt
light
Crt
light
Crt
mesh
Diplexer
Adapter, Cable, Visor, Manual,
Manual,
Manual, Manual,
Manual,
GPIB
Information-494/494P
coaxial
Coax
4
cable,nto
cable,
n
maletobnc
A
fasta
cord
clamp
filter,
amber
filter,
grey
filter
Assembly
tnc
semi-rigid
to
,
sma
coaxial
crt
Operators Operators Service,
Service,
Volume
Volume
Programmers
interconnect
cable
bnctobnc
female
Handbook
1
2
(494P
(494P
n
connector,
connector,
only)
only)
Operators
72
­18"
STANDARD
Table
ACCESSORIES
1-1
Front
Cover
Front
Cover
Front
Cover
Front
Cover
Front
Cover
Front
Cover
Front
CoverorDrawer
Front
Cover
Front
Cover
Front
Cover
Part of
Diplexer PartofDiplexer Front
Cover
or
Front
Cover
or
Not
applicable
Not
applicable
Not
applicable
Not
applicable
Not
applicable
or or
or or
or or
or
or or
Drawer Drawer
Drawer
Drawer Drawer
Drawer
Drawer Drawer
Drawer
Assy
Assy Drawer Drawer
"The
are
charged
slow 4
Deleted
power
brow
.
for
cord
to
Option
and
2A
fuses
slow
blow
08
instruments
WM WM490A
WM WM
WM WM
WM
WM WM490G
G-J
are
replaced
.
Option
52
.
TEKTRONIX
Nomenclature
490K
490U 490V 490E
490W 490F
490D
Band
flange
with
an
(North
appropriate
American
HIGH
transistion
power
Configuration
Table
PERFORMANCE
cord
1-2
for
the
for
220Vwith
WAVEGUIDE
power
cord
option
standard
MIXERS
Frequency
18
26.5to 33to60
50to75 60
75to110 90to140
110 140to220
220
(Al,
power
to
26.5GHz 40
to90GHz
to
170
to
325
A2, A3, A4, cord)
replaces
Range
GHz GHz GHz
GHz GHz
GHz
GHz
GHz
A5)
and
fuses
the
with
fuses
2A
General
Information-494/494P
Operators
Firmware
This
firmware initial
power-up
screen Electrical
the
ware
for
ROM's
version
Version
featureofthe
version
Parts
when
cycle,
approximately
list
section,
and
their
.
Error
494/494P
the
power
the
two under
Tektronix
Message
provides
on/offiscycled.During
firmware
seconds.The
Memory
part
number
Readout
readoutofthe
version
Board
flashes
Replaceable
(A54),
for
each
on
lists
firm-
An
additional
microcomputer error
message
the
error(i.e.,failedtocomplete
featureiserror
failstocomplete
will
flash
on screen
message
any
routineorfunction,
explaining
phase
lock)
readout
the
.
.
If
nature
the
an
of
Introduction
This
section
safety
and
characteristics
includes
electrical,
of this
SPECIFICATION
physical, instrument.Changes
environmental,
to
specification,
this section
.
Section
duetooptions are
2-49414194P
listedinthe
Operators
Options
following
The tures
applytothe
30-minute quirement
tive explains
mance sideredtobe supportedbya
to
verify
formance
Center mixer)
Accuracy
has
been
Bands1&
X200
Span/Div>100
Bands `200
SpanlDiv~_10
warmup, cofumn
terms
performance
information.Statementsinthis
performance
sectionofthe
Frequency
(after
performed)
kHz,
1&5-12
kHz
tablesofelectrical
494/494P
exceptasnoted.The
defines
in
and
guaranteed
performance
Characteristic
Range
the
front
5-12
with
and
Bands kHz
with
and
bands
0kHz
some
limit
form.The
requirements
performance
requirements
service
(internal
panel
Span/Div
2-4,
SpanIDiv
2-4
ELECTRICAL
characteristics
Spectrum
characteristics
Supplemental
check
procedure.Procedures
are
manual
CAL
with
with
Analyzer Performance
or
provides
column
and
are
provided
.
FREQUENCY
[(20%
Bandwidth,
(CFXref
"
x(20%
Bandwidth,
(CFXref
CHARACTERISTICS
and
fea-
after
a
Re-
in
quantita-
column
perfor-
are
not
con-
not
ordinarily
in
the
Per-
Table
RELATED
Performance Requirement
of
Span/Div
whichever
freq
error)+(N
of
Span/Div
whicheverisgreater)
freq
error)i(2N +
The
bration the
instrument specified.An does
tise,isprovidedinthe incoming
the
capabilitiesofthe
2-1
CHARACTERISTICS
or
is
greater)
X
or
instrument
check
not
require
inspections
Resoln
;
15 kHz)] ofN.
Resoln
;
25)Hz
microprocessor
time
each
frequency
operation
external
10
kHz
panel keyboard
Accuracy functionofthe center
(covered and
during canbesignificant after temperature.
Referto"IF Harmonic
-+-
spans When
withinaband,asettling changeincenter shouldbeallowed
The
f
spans
performsaninternal
poweristurnedonand
and
amplitude
or functional
test
operators
and
help
instrument
Supplemental
to21GHz.Tuned
knob
.
of
frequencyisset
by
the
amount
a
sweep.Center
turn-on,orafterachangeinambient
Number"
The
.
the
center
1st
LO
check
equipmentortechnical
instructionstosatisfy
familiarize
.
Information
or
front
panel
the
center
accuracy
CF
accuracy
of
center
during
Frequency,
specification
1st
LO
is
unlocked
frequencyischanged
frequency,
.
is
phase
verifies
performanceisas
procedure,
the
operator
by
frequency
do
between
specification),
frequency
frequency
the
LO
timeof1
divided
locked
which
exper-
most
the
front
Data
Entry
is
which
sweeps
drift
first30min
Range,
for
value
in
these
s/GHz
by N
in
these
cali-
that
with
a
the
drift
.
and
REV
MAR
1984
Specification-494/494P
Operators
Table
2-1 (cont)
Drift
CF temperature
After30minute
After1hour
Signal
Reference
(constant
Bands1& X200
kHz,
Span/Div Bands1&
--200
kHz
Span/Div--100
Bands1&
X200
kHz
Span/Div Bands
1
&
_200
kHz
Span/Div Readout
Sensitivity
Readout
Aging
Accuracy (ambient)
power
Resolution
Counter
Resolution
Frequency
Rate
on
Characteristic
ambient
and
fixed
center
warmup
5-12
and
>
100
5-12 Bands
warmup
5-12
and
X100
5-12
and
--
100
Accuracy
during and30minutes
with
Bands kHz
with
2-4
kHz
:
with
Bands
kHz
with
Bands
kHz
Error
warmup
:
Span/Div
Span/Div
Span/Div
Span/Div
2-4
with
2-4
2-4
at
after
frequncy)
with
with
with
25°C
Performance Requirement
--50Hzper
+[(Counter
reference LSD]
Signal
20 noise
Reference
dB
level
or
level
minuteofsweep
frequency
error)+(10+2N)Hz
at
center
more
above
and
within
Level
X
screen
the
60
dB
time
frequency
+
must
average
of
the
Since
the center
before observedisduring
--(25
kHz)N
X150
Hz
_(5
kHz)Nper minuteofsweep
At
least
1
1
Hz
through1GHz,
COUNT
1X10-7
than
1
X10-7per year
Within
5X10eof
hours
Supplemental
frequency
each
sweep
sweep
per minute
per minuteofsweep
10%
of
Span/Div
RESOLN
for
first
control
six
the
frequency
Information
is
the
only
time,
of
sweep
time
selectable
months
then
corrected
error
time
time
with
less
after
24
Temperature
ResidualFM(short
warmup
:
Bands1& X200
Span/Div Bands1&
_200 Span/Div--100
kHz,
kHz
sensitivity
5-12
and
>
100
5-12
Bands
term)
with
bands kHz
with
2-4
kHz
after1hour
Span/Div
2-4
with
Span/Div
with
--(7
kHz)N
--(10+2N)Hz
total
total
excursion
excursionin20
in
20
ms
ms
Within operating
referen
cedto+25°C
2X10
range
-8
over
of
the
-151C
instrument
to
+550C,
Table
2-1
(cont)
Specification-494/494P
Operators
"Static"
down)
Shape
Noise
Video
Pulse Frequency
Factor
Sidebands
Filter
N
arrow
Wide
Stretcher
Range-in
the
SPAN/DIV
significant Entry
Characteristic
Resolution
(60
Falltime
Span/Div
a
1-2-5
digits
keyboard
Bandwidth(6dB
dBl6
dB)
sequence
control,orby
from
the
Data
two
with
Performance
30 Hz
then
100
steps
plusanAUTO
Resolution
the
selected
7.5:1 30 Hz
At
least-75
resolutionoffset(-70 resolution
bandwidthiswithin
bandwidth
or
less,
resolution
bandwidths
Hz
to
and
bandwidth
dBc
Requirement
MHz
1
position
.
15:1or less
at
30 times the
_100
in
decade
.
20%
.
dBcfor
Hz)
.
In automatically
of
computer setting
Vertical selectors.When
BANDWIDTH settoAUTO
the settings
for
Reduces approximately
resolution bandwidth
Reduces approximately resolution
bandwidth
30
,s/div(±50%)
(0-7.1GHz)
(5
Suppleme
AUTO
of
optimum
.
Band
1-3
4-5
.4-21
position
selected
whose
the
Display,
and
the
resolution
video
1/300
bandwidth .
video
1/30
bandwidth
.
GHz)
ntal
Information
the
bandwidth
by an
output
SPAN/DIV,
depends
and
Video
the
RESOLUTION
TIME/DIV
microcomputer
and
and
Narrow
Span/Div
50
50
selectors
for
the
bandwidth
of
the
11100
bandwidth
of
the
11'10
Hz
Hz
internal
on
TIME/DiV,
Filter
selects
SPAN/DIV
selected
for30Hz
selected
for30Hz
Wide
Span/Div
200
MHz
500
MHz
is
the
are
to
to
Accuracy/Linearity
Within over the
division
5%,
of
the
selected
center8divisionsofa
display
.
Span/Div
10
(18-26
(26-90
(75-140
(110-325
Two
additional (MAX display
6
7-9
10
11-12
Span)
.
GHz)
GHz)
GHz
GHz)
50
50Hz 2
50
50
po
sitions
displ
ayor0Hz(Zero
Hz
Hz
Hz
provide
1
5
10
full
GHz
GHz
GHz
GHz
band
Span)
Specification-49414941'
Operators
Table
2-1
(cont)
"Frequency
Coaxial
External Performance
Response
(direct)
Input
Band
50
kHz-1.8GHz
10
kHz-1.8GHz
Band
1
.7-5.5GHz
Band
3
.0-7.1GHz
Band
5.4-18.0GHz Band
15
.0-21.0GHz
Tektronix
Waveguide
Band
15
0-26
Band
26
.0-40.0GHz
1
2
3
4
5
High
6
GHz
7
Mixers
About
point between
extremes
±1 ±2.0
i 2.5dB
+2.5
-3.5dB
±5.0dB
±3.0dB
±3.0dB
the
mid-
(mean)
two
.5cIB
dB
dB
Referenced
to
100
MHz
+2.5dB
+3.0
dB
+3.5dB
".3.5dB
.
4
.5
dB
+ 6.5d
6.0d
B
-4-60
dB
Frequency
10dBofRFattenuation
timized when effectofinput variation,
storage
4 0
.5p greater Rackmount/Benchtop
31.and variance
for
response
each
center
is
frequency
applicable.Response
vswr,
mixing
pre-selector,
typically
,
o
.
Display
than
frequency
and
increases
flatnessistypically
response
data
32)inthe
Options
.
measured
and
Peaking
includes
mode
mixer
(Option
section
with
op-
setting,
the
(N),
gain
.
Digital
errors by
1
dB
.
Refer
to
30,
for
B
Band
8
33
.0-60.0GHz
Band
9
50.0-90.0GHz Band
10
75
.0-140.0GHz
Band
11
110-220
170-325
"Referto"VerificationofTolerance
Band
GHz
12
GHz
Limits"atthe
t3.0dB
beginning
of this
"6.0
dB
specification
.
Typically-3dB
GHz
5
bandwidth
over
Typically±3dBover 5
GHz
bandwidth
Typically±3dB 5
GHz
bandwidth
Typicallyi3dB 5
GHz
bandwidth
over
over
any
any
any
any
2-4
REV
MAR
1984
IF
Frequency,
LO
Table
Range,
2-2
and
Harmonic
Number
Specification-4941494P
(N)
Operators
Band
and
1
(0-1.8GHz) 2(1.7-5.5GHz) 3(3.0-7.1GHz)
4(5.4-18.0GHz) 5
(15-21 6
(18-26 7
(26-40 8
(33-60 9
(50-90
10
(75-140
(110--220
11 12
(170-325
Characteristic
Vertical
Display
Freq
GHz) GHz)
GHz) GHz) GHz)
GHz)
Modes
GHz) GHz)
Range
Table
AMPLITUDE
Performance Requirement
RELATED
2072-3872(1-) 2072 2529-6329(1--)
2171-6271(1+) 2072-6276
4309-6309 2655-4071
2443-3793 3792-5790 3195-5862
3170-6000 2917-5790 2998-5841
2-3 CHARACTERISTICS
10 between
the
Range
LO
Harmonic
(3-) (3+) (6+)
(10+) (10
(15+)
(23+) (37+)
(56-1
dBIDiv,
Data
and
(N)
+-)
)
Supplemental
2 dBIDiv,
1-15
dBIDiv
Entry
keyboard
1st
(MHz)
829 829 829
2072 2072 2072
2072 2072 2072 2072
2072
Information
and
linear.Any
can
alsobeselected with
.
IF
integer
Reference
Range
Steps
Level
(full
screen)
-117
dBm
10
dB
ofIFgain
maximum rangeis20
safe
input
In
the 10
for
the
coarse mode.In coarse and
When
the dBIDivisset
keyboard, display
the for toas4A
In increments sequence
mode
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to
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maximum
the
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1
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the
to
when
dBIDiv
(referred
VoltslDiv
dB
for
Specification-4941494P
Operators
Table
2-3
(cont)
Accuracy
Display
Characteristic
Dynamic
Range
Performance
Requirement
Supplemental
Accuracy gain,
calibrating frequency
isafunction of
resolution
source(i.e.,internal
band accuraciesofthese CAL
buttonisactivated
calibrating the
resolution ambient
routine,
REF
bandwidths
temperature
LEVEL
calibrationisrun, can change
+0
.15
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input
reference
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MIN
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-20
80
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.
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to
and
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at
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a
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-29
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NOISE
.
increase,10dBofgain
activated),in10
dB
decrease
1
and
dB
:
;
.
2-6
REV
MAR
1984
Table
2-3
(cont)
Specification-4941494P
Operators
Characteristic
Variation
Gain
Resolution
CAL
routine
With Between anytwofi
Differential Measurement
Range
Accuracy
Spurious
Residual
referencedtomixer
fundamental
and bands
between
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has
respectto1
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1-3
.
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signal),
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Performance Requirement
than
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-100
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0
.25
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established
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dB
NOT USE
dB
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0 2
10 40
50
Supplemental
at
-20
provides
when
level
.25
differential
.
to48dB
theJAmode
AA
.
Information
dBm
below
mode
Steps
200
MIN
DISTORTION
measurements
the
reference
was
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above
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+30
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0
.15
1.0d8 2
.0
in
level
.
dBm
r
dB
dB
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50
kHzto1.8GHz
and1.8 Bands
1
.7-1.8GHz
Harmonic
50
kHz-1.8GHz
1
.7-21
LO
Emission,
attenuation oReferto"VerificationofTolerance
products
to 21.0GHz
2-4)
(Band2only)
Distortion
GHz
withno(0)
(Band
(Band
1
for
1)
RF
At
least
screen span
At
-40
span
Typically signalinMIN
At Less
Limits"atthe
signals
least
dBm
least
-100
than --70
-70
dBc
-70
signals
-60
dBc
DISTORTION
dBc
beginning
within
dBc
within
dBm
from
from
below
to 21
of this
any
two
any
frequency
any two
any
frequency
full
a
mode
GHz
specification
on
screen
.
=-100 100
MHz
dBc
or
more
when
in
signals
preselected
are
bands
separated
REV
FEB
1985
2-
7
75
Specification-494/494P
Equivalent Tektronix
maximum
High
Performance
Band/Frequency
Band
150
kHz-1.8GHz Bands2& Band
Band Band
aBand aBand
aBand aBand
31
.7-7,1
4
.4-12
5
.0
GHz
412.0-18.0GHz 515
.0-21.0GHz
618
.0--26.5GHz
7
26
.5-40
.0
833
.0-60.0GHz
950
.0-90.0GHz
input
GHz
GHz
Operators
noise
for
Waveguide
each
Mixers
resolution
for
bands
30
-96
-
-106 -103
---
Typically 90
GHz
Table
SENSITIVITY
bandwidth, using
6-12
118-325
Equivalent Input
Hz
100
-121
--121
-
106
-101
.111
106
-95
-103
dBm
2-4
the
-118
-118
-103
GHz)
Hz
internal
.
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mixer
for
bands
in
dBm
versus
1
kHz
-110
10
-100
kHz
-110 -100
--95
-85
1-5
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Resolution
100
-90 -80
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-98 -90 -80 -70
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-108
forikHz
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-95
--
100
95
--75
-90
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-85
bandwidthat50 GHz,
- 65
-75
degradingto-85 dBm
kHz-18
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kHz
80
GHz),
1
MHz
-65
-60
-55
-70
-65
-65
and
at
aBand
1075
8and
11110-220
0
12170--325
-'Band
nTektronix
.0-140
High
Performance
GHz
GHz
GHz
Waveguide
Mixers
Typically
140
GHz
Typically
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Typically
dBm
--55
-90
-80 at
--70 at
dBm
dBrn
220
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325
for1kHz
for1kHz
GHz
for1kHz
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bandwidthat75 GHz,
resolution
resolution
bandwidthat110
bandwidthat170
degradingto-75 dBm
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to
to
RF INPUT
Input
Impedance
Maximum
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1
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Otherwise
Optimum linear
operation
External
Mixer
EXTERNAL
Fr
eque
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Input
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Characteristic
Input
Safe
Point
level
for
REFERENCE
dance
Table
INPUT
SIGNAL
Performance Requirement
-28
dBm
--18
dBm
--25
dBm
1,2,5,
-15
or 10
dBm
CHARACTERISTICS
at
Min
Noise
at
Min
Distortion
MHz,
to
+15
dBm
2-5
+5
ppm
.
Specification-4941494P
Supplemental
N
Type 21GHz
50tt;
50 2
6
18-21
+30
pulse duty
DO INPUT
No RF No RF
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Information
connector,
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(typically1.9
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HORIZITRIG
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1986
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ct
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ignal
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1405
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and
screen
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ac)
kHz
then
kHz and
.
Sideband
generated
Input
2-
ac
.
V
9
Specification-4941494P
Operators
OUTPUT
SIGNAL
Table
2-6
CHARACTERISTICS
Calibrator
1stLO
EXTERNAL
VERTical
HORIZ
PEN 10
Out
LIFT
MHz
and
IF
Characteristic
(CAL
OUT)
2nd
LO
MIXER
_-
_
.
Performance Requirement
-20
dBm
t
0
.3
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100
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In
the
is
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internal Provides 0.5V
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Access approximately
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PORTS
ALL
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that
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MUST
TIMES
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the 10
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-30
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Information
provide
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and
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of
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below
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either
.
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a
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TERMINATED
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.
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side
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Output
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500.
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.0
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of
the
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to
IN
bias
range
change
division centerline
center.Full
impedance
.
pen
level
screen
of
of
is
a
.
.
GENERAL_
Table
2-7
CHARACTERISTICS
Specification-494/494P
Operators
IEEE
Std
PROBE
Sweep
Triggering
Crt
Non-volatile
POWER
Sweep
Accuracy
Readout
Characteristic
488-1978
Time
Memory
Port
(GPIB)
494P
Performance
20
us/Div
sequence AUTO)
-+
.
5%
.
2
division
internal
minimum,
to5s/Div
(10
.
or
;
and
for
Requirement
in
s/Div available
more
of signal
1.0V
external
1-2-5
for
peak,
In
accordance
Tektronix Version81.1
Provides operating
probes.Output Pin
1,
+5
Pin3,-15
100
mA
Triggered,
in
Displays
display range, internal GPIB
Instrument
offsets, each band
powered +55°C 1-2
than volatile
-15°C +85°C
:
mode,
resolution
or
states(494P
and
instrument
years
5
years
memory
to
non-operating
Supplemental
with
codes
voltages
V
100
@
V
100
@
max
.
(see
auto,
manual,
Reference
frequency
bandwidth,
external
settings,
preselector
are
stored
CMOS
.
At
+25°C,
.
Retention
will
+55°C
Information
IEEE
488
and
voltages
are
mA
max.Pin
mA
max.Pin
Figure
and
level,
frequency,
spanldiv,
frequency
onl
y)
displays,
peaking
in
RAM
.
Battery
ambient
life
should
of
occur
over
operating,
.
standard,
format
:
RIF attenuation,
back-up
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standard
for
2,
ground
4,
2
'-1)
external
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data
vertical
frequency
calibration
codes
battery
life
be
greater
in
the
range
and
-30
.
active
+15V
non-
and
.
and
for
is
of to
Specification-4941494P
Operators
PowER.The
systems.Itisnot
used
as a
probes
or
with
this
use
instrument
source
sourcetor
accessories
.
provides
recommended
applications
connector
operating
that other
are
specifically
than
on
the
for active
connectors the
compatible
designed
rear
be
for
2726-21
inputVoltage Power
Power
Leakage
powertothis
If turn
the
Figure
Characteristic
Current
instrumentisinterrupted,itmaybenecessary
POWER
switch
for5seconds
OFF
then
ENVIRONMENTAL
2-1.Probe
POWER
backON.
power
Table
2-8
REQUIREMENTS
to132
90
115
At 5
mA
NOTE
re-initialize
to
Table
2-9
CHARACTERISTICS
connector
.
Vacor180to250
V,60Hz;210
maximum
the
Description
Vac,48to440
watts
maximum,3.2
microcomputer
;
Hz
amperes
when
powerisrestored,
.
.
MIL
Meets
Temperature
Operating
Non-operating
T-28800C,
and
Humidity
type
111
class3,style
Characteristic
specifications,
C
comprisedofthe following
Description
-10to+55°C195%
mentistested
-62
to
+85°C
and
.
(+5%,
meets
:
-15
-0%) to
-*-55°C)
relative
humidity
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.
After
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instrumenttowarm
the then
backOn.
Altitude
Operating
Non-operating Hu Vibration
(Non-operating)
midity
Operating
platform
at
temperatures
(instrument
during
test)
Characteristic
below
for15minutes
up
securedtoa
the
operating
and
vibration
Table
2-9
I
NOTE
range,
the
re-initialize
the
(cont)
microcomputer
microcomputer
15,000
40,000
Five
MIL-Std-810,Method searches
quency nances
frequency,or55 minimum.Total
feet feet
cycles
varied must
(120
along
all
from
be
minimum/axis
vibration
Specification-4941494P
Description
may
by
hours)inaccordance
three
Hzifno
initialize
not
turning
514
ProcedureX(modified).Resonant
axisat0.020
5-55
Hz
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time
on power-up.!f
the
POWER
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plus
about75minutes
Off
for5seconds
with
Mil-Std-810
inch
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dwellatthe
for10minutes
Operators
so,
major
resonant
.
allow
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Shock
(operating
Transit
Electromagnetic
drop
Conducted
Conducted
Radiated
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Emissions
and
non-operating)
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Interference
Emissions
Susceptibility
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Three
shocks
tion
along
shocks 8
is Meets
as
CE01-60 CE03-15
power CS01-30
power CS02--50
400 CS06-spike
leads RE01-30
magnetic
.
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tested
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leads
leads
MHz
.
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and
meets
Method
Hzto15 kHzto50
.
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.
kHz
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Hzto50
field
.
one-half
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axis
eachofsix
drop
describedinMil-Std-461BPart4,except
kHz
MHz
kHz
to
leads
.
power
kHz
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faces
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height
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Remarks
1
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.
kHzto50
15 15dB.
limits
Full
Full limits
Full limits
Relaxed fundamental
power Exceptioned, 30
duration
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eight
corners.(Instrument
inches
.)
kHz
only
kHz, relaxed by
.
.
.
by 10
dB
10th
to
line
.
kHzto36
each
.
for
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of
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.
Radiated
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RE02-14 10
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kHz
.
Hzto50
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Full
limit
A
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.
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only
GHz
2-13
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